What information about the structure of the atom is given by: a) serial number b) period number c) group number

Consider the information that gives the serial number, group and period numbers about the atomic device:

1) serial number. The number of an element is equal to the number of protons and electrons that are contained in its atom. Also, thanks to the ordinal number, neutrons can be counted;

2) period number. The period number corresponds to the number of electronic layers;

3) group number. The group number is equal to the number of electrons (elementary particles) on the outer electronic level.